Idea: a side-scrolling game set in a city. You're on ground level, with the cars, people, animals, lamp posts, whatever. You have four options while you wander around: jump, punch, pick up, throw. The more stuff you vandalise, the more points you score. The more points you score, the bigger you become, from kicking dogs to throwing trucks to dwarfing buildings. Of course the bigger you are, the harder you fall - and by 'harder' I mean 'more' and by 'fall' I mean 'take damage from helicopters, tanks and rival monsters'. The objective - gain a lot of points before kicking the bucket.
It's like a cross between Mario and GTA. You know, for kids.